| Abbreviation | Definition |
|---|---|
| GSTIN | Goods and Services Tax Identification Number |
| GSTIN | Goods Service Tax Identification Number |
| GSTIN | Goods Services Tax Identification number |
| GSTN | Goods and Service Tax Network |
| GSTN | Goods and Services Tax Network |
| GSTN | Goods Service Tax Network |
| GSTT | Generation Skipping Transfer Tax |
| GSTT | Generation-Skipping Transfer Tax |
| GTBR | Green Tax and Budget Reform |
| GTBR | Green Tax Budget Reform |
| GTC | Georgia Tax Center |
| GTCE | Global Tax Centre Europe |
| GTN | Global Tax Network |
| GTOF | Glasgow Taxi Outing Fund |
| GTTC | Global Tax Treaty Commentaries |
| HCTA | Host Country Tax Authority |
| HCTA | Host County Tax Authority |
| HEART | Heroes Earnings Assistance and Relief Tax |
| HHTC | Homeless Hiring Tax Credit |
| HINT | High Impact Nominally Taxing |